Teenage girls are spending more than £20 a week at the shops – nearly £3 more than boys

Girls also spent more than boys on books, while boys spend 10 times as much on computer games. And some 75 per cent of 13 to 15 year-olds buy at least one soft drink a week - mostly away from home with an average spend of 90p.

The average 15 year old spends £25 a week- three times more than a seven year old, figures showed yesterday.

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